<link href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<!------ Include the above in your HEAD tag ---------->
<div class="container">
<div class="row">
<div class="form-group" >
<div class="input-group">
<span class="input-group-addon">Label</span>
<select class="form-control">
<option>Select an option</option>
<option>1</option>
<option>2</option>
</select>
</div>
</div>
<div class="form-group" >
<div class="input-group">
<span class="input-group-addon">Label</span>
<input type='text' class='form-control'>
</div>
</div>
</div>
</div>
.input-group .form-control {
border-left: 0px;
}
.input-group-addon{
background: rgba(237,237,237,1);
background: -moz-linear-gradient(left, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 92%, rgba(255,255,255,1) 100%);
background: -webkit-gradient(left top, right top, color-stop(0%, rgba(237,237,237,1)), color-stop(0%, rgba(237,237,237,1)), color-stop(92%, rgba(237,237,237,1)), color-stop(100%, rgba(255,255,255,1)));
background: -webkit-linear-gradient(left, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 92%, rgba(255,255,255,1) 100%);
background: -o-linear-gradient(left, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 92%, rgba(255,255,255,1) 100%);
background: -ms-linear-gradient(left, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 92%, rgba(255,255,255,1) 100%);
background: linear-gradient(to right, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 0%, rgba(237,237,237,1) 92%, rgba(255,255,255,1) 100%);
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#ededed', endColorstr='#ffffff', GradientType=1 );
}
